/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.frankkie.parcdroidprj;

import android.app.Activity;
import android.content.Context;
import android.graphics.*;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.util.Config;
import android.util.Log;
import android.view.View;

public class Compass extends Activity {

  private static final String TAG = "Compass";
  private SensorManager mSensorManager;
  private SampleView mView;
  private float[] mValues;
  private final SensorEventListener mListener = new SensorEventListener() {

    public void onSensorChanged(int sensor, float[] values) {
      if (Config.LOGD) {
        //Log.d(TAG, "sensorChanged (" + values[0] + ", " + values[1] + ", " + values[2] + ")");
      }
      mValues = values;
      if (mView != null) {
        mView.invalidate();
      }
    }

    public void onAccuracyChanged(int sensor, int accuracy) {
      // TODO Auto-generated method stub
    }

    public void onSensorChanged(SensorEvent arg0) {

      if (Config.LOGD) {
        //Log.d(TAG, "sensorChanged (" + arg0.values[0] + ", " + arg0.values[1] + ", " + arg0.values[2] + ")");
      }
      mValues = arg0.values;
      if (mView != null) {
        mView.invalidate();
      }
      //throw new UnsupportedOperationException("Not supported yet.");
    }

    public void onAccuracyChanged(Sensor arg0, int arg1) {
      //throw new UnsupportedOperationException("Not supported yet.");
    }
  };

  @Override
  protected void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
    mView = new SampleView(this);
    setContentView(mView);
  }

  @Override
  protected void onResume() {
    if (Config.LOGD) {
      Log.d(TAG, "onResume");
    }
    super.onResume();

    mSensorManager.registerListener(mListener, mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION), SensorManager.SENSOR_DELAY_NORMAL);
    //registerListener(mListener,
    //	SensorManager.SENSOR_ORIENTATION,
    //	SensorManager.SENSOR_DELAY_GAME);
  }

  @Override
  protected void onStop() {
    if (Config.LOGD) {
      Log.d(TAG, "onStop");
    }
    mSensorManager.unregisterListener(mListener);
    super.onStop();
  }

  private class SampleView extends View {

    private Paint mPaint = new Paint();
    private Path mPath = new Path();
    private boolean mAnimate;
    private long mNextTime;

    public SampleView(Context context) {
      super(context);

      // Construct a wedge-shaped path
      mPath.moveTo(0, -50);
      mPath.lineTo(-20, 60);
      mPath.lineTo(0, 50);
      mPath.lineTo(20, 60);
      mPath.close();
    }

    @Override
    protected void onDraw(Canvas canvas) {
      Paint paint = mPaint;

      canvas.drawColor(Color.WHITE);

      paint.setAntiAlias(true);
      paint.setColor(Color.BLACK);
      paint.setStyle(Paint.Style.FILL);

      int w = canvas.getWidth();
      int h = canvas.getHeight();
      int cx = w / 2;
      int cy = h / 2;

      canvas.translate(cx, cy);
      if (mValues != null) {
        canvas.rotate(-mValues[0]);
      }
      canvas.drawPath(mPath, mPaint);
    }

    @Override
    protected void onAttachedToWindow() {
      mAnimate = true;
      super.onAttachedToWindow();
    }

    @Override
    protected void onDetachedFromWindow() {
      mAnimate = false;
      super.onDetachedFromWindow();
    }
  }
}
